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?40mmhg?83130mmhg ????????????????????????120???80???40??????????????????????^ ?????20~60?2.67~8.0Kpa60????20?????1??????????2?????????3?????? ?...

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1.?? ?????20%????????????????????????????????????????????

2.? ?????????R???????????T????????????????????????????????8kPa(60mmHg)???????????

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??800ml???20%????...

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??????90%???????????????????

1.?????12??????????????????

2.????????????????????????????70%???????????12mm1cm??????????10%?????????????12?????

3.???????????????????????????????12?????????

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1.??????????????????????????12????...

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